Background image resizing to object scale

[OO-HFE]

Hello

Being new in Blender (2.82) as well as 3D-modelling, I'm looking for advise regarding "background image resizing".

I am trying to make a low poly aircraft just as an exercise. What I did is as follows:
1. Adding a background image into Blender (technical drawing of the aircraft) in right orthographic view
2. Adding a cylinder (being the basic shape)
3. Rotating the cylinder to match the view perspective
4. Adapt the "aircraft length" dimension (y-axis) to have a real scale dimension (Example image below)

What I want to do know is resizing the background image using the same proportion as the cylinder. So the background image will display the real life dimensions which I can use as a reference.
But I'm not really sure how to. So my question is, how would I correctly size the background image TO the object (not vice versa)? Of course, if there is a better way to do this, I'm happy to hear.

I can resize the background image manually based on look and feel. But I want to have it correctly adapted instead of playing around with the size.
I'm using the metric system. The united of the cylinder were initially 1m whilest the background image size is 5m (being a 1139x1667 .png file)

My apologies must the above question be a repetitive one but the existing tutorials and manuals didn't include an answer to my question.

Thanks for any feedback!

Rgds

 

[Vitus]

That's actually a really interesting question - what would be the proper procedure to scale your reference drawings to match your grid.
So far, I've been using a similar method as you. I usually put a reference block down that I scale up to match the known dimension of the aircraft. That is usually wingspan*length*height, although height can be a bit tricky. Next, I add the reference image, scale it up (s) and move it (g) to match my reference cube. As long as you scale the image in all dimensions simultaneously, the aspect ratio should work out alright. Once your satisfied with the view you started with, shift+d or alt+d to duplicate your image and then rotate it by 90 degrees (r x/y/z 90) and use g to move it to the right position. Rinse and repeat until the resulting outline matches your expectations.

But as I said, if there's an empirical way to scale up the reference image, I'd be interested to hear it too!

 

[kalong]

I do simple work, but this done in 3Dsmax, just share the work flow,
1. cut blueprint image became 3 separate image file (or more depend on source reference). each file would have it own view (left, top, front). image file must be precise the most outer of image draw (regardsless size / pixel).
2. in 3dsmax, create box with aircraft dimension. flip normal all polygon, on object properties check mark backface cull.
3. change each polygon into different material ID (depend on file would attached).
4. in material editor create material with sub-material, insert all reference file.
5. attach sub-material into right polygon (left, top, front).
done

 

[Pyscen]

Hey @kalong

Can you do us a favor... could you send a simple .x file of a box with PBR textures and other textures. All from 3dsMax that is?

Also, a simple question: Are you able to convert into a model file just by using simple materials (non-textured) with 3dsMax?

 

[kalong]

yes, just standby...
if you have sample PBR texture make me faster create model

yes, non textured model work fine in sim. in P3D non textured model doesn't cast shadow, however it still received shadow.

 

[Pyscen]

Thanks... I have a PBR texture but it's too large would you PM your email?

 

[OO-HFE]

Once your satisfied with the view you started with, shift+d or alt+d to duplicate your image and then rotate it by 90 degrees (r x/y/z 90) and use g to move it to the right position. Rinse and repeat until the resulting outline matches your expectations.

That is what I do now, indeed.

I do simple work, but this done in 3Dsmax, just share the work flow,
1. cut blueprint image became 3 separate image file (or more depend on source reference). each file would have it own view (left, top, front). image file must be precise the most outer of image draw (regardsless size / pixel).
2. in 3dsmax, create box with aircraft dimension. flip normal all polygon, on object properties check mark backface cull.
3. change each polygon into different material ID (depend on file would attached).
4. in material editor create material with sub-material, insert all reference file.
5. attach sub-material into right polygon (left, top, front).
done

That's a possible solution but any idea on the exact scaling of BG-images rather than doing the above (or eyeballing)?

Thank you both so far!